Error While Writing Encrypted Data Stream

Contents Cryptostream Flushfinalblock Bad Data Bad Data Exception C#

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site system.security.cryptography.cryptographicexception bad data c# About Us Learn more about Stack Overflow the company Business Learn more about bad data exception java hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join bad data cryptographicexception c# the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C# Rijndael issue run-time vb.net flushfinalblock bad data error while trying to decrypt Padding is invalid or cannot be removed up vote 1 down vote favorite I get a run-time error Padding is invalid and cannot be removed while trying to decrypt some data. I have read all the similar threads I found on stackoverflow and considered the following issues: Given a different key for decryption than the one used for encryption might bring

Cryptostream Flushfinalblock Bad Data

the above issue. However, as you can see in the source for testing purposes I hard-coded the keys and I still get a runtime error. The application may be trying to use a different padding mode for decryption than the one used for encryption. Setting the mode explicitly during the encryption or decryption process didn't solve the problem. Some say that you would need to use the FlushFinalBlock method so you can tell the application to put the final bits into the blocksize. Tried putting it below the Write method, didn't work either.

using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) { //Write all data to the stream. swEncrypt.Write(plainText); csEncrypt.FlushFinalBlock(); } 

Below are the snippets of my code: // Encrypt private byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV) { Key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 }; IV = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6 }; // Check arguments. if (plainText == null || plainText.Length <= 0) throw new ArgumentNullException("plainText"); if (Key == null ||

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Bad Data Exception C#

any questions you might have Meta Discuss the workings and bad data error in c# policies of this site About Us Learn more about Stack Overflow the company Business Learn more c# rsa decrypt bad data about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community http://stackoverflow.com/questions/19209741/c-sharp-rijndael-issue-run-time-error-while-trying-to-decrypt-padding-is-invalid Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C# “Bad Data” exception when decrypting encrypted file up vote 1 down vote favorite 1 Hey I'm very new to encryption and decryption, or even the c# http://stackoverflow.com/questions/5591361/c-sharp-bad-data-exception-when-decrypting-encrypted-file language to be honest. Basically, I have a tcp chat server that "saves" logs and encrypts the text file. This is how I encrypt (based from the MSDN sample): public static void EncryptFile(string strInputFileName, string strOutputFileName, string strKey) { FileStream fsIn = new FileStream(strInputFileName, FileMode.Open, FileAccess.Read); FileStream fsOut = new FileStream(strOutputFileName, FileMode.Create, FileAccess.Write); DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = ASCIIEncoding.ASCII.GetBytes(strKey); des.IV = ASCIIEncoding.ASCII.GetBytes(strKey); ICryptoTransform desencrypt = des.CreateEncryptor(); CryptoStream cryptostream = new CryptoStream(fsOut, desencrypt, CryptoStreamMode.Write); byte[] byteArrayInput = new byte[fsIn.Length - 1]; fsIn.Read(byteArrayInput, 0, byteArrayInput.Length); cryptostream.Write(byteArrayInput, 0, byteArrayInput.Length); fsIn.Close(); fsOut.Close(); } The method success fully encrypts files. This is my decrypt method: public static void DecryptFile(string strInputFileName, string strOutputFileName, string strKey) { DESCryptoServiceProvider des = new DESCryptoServiceProvider(); des.Key = ASCIIEncoding.ASCII.GetBytes(strKey); des.IV = ASCIIEncoding.ASCII.GetBytes(strKey); byte[] te = new byte[1024]; FileStream fsRead = new FileStream(strInputFileName, FileMode.Open, FileAccess.Read); ICryptoTransform desdecrypt = des.CreateDecryptor(); CryptoStream cryptostream = new CryptoStream(fsRead, desdecrypt, CryptoStreamMode.Read); StreamWriter fsDecrypted = new StreamWriter(strOutputFileName); fsD

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SecurityHandler java.lang.Object org.apache.pdfbox.pdmodel.encryption.SecurityHandler Direct Known Subclasses: PublicKeySecurityHandler, StandardSecurityHandler public abstract class SecurityHandler extends Object This class represents a security handler as described in the PDF specifications. A security handler is responsible of documents protection. Author: Ben Litchfield, Benoit Guillon (benoit.guillon@snv.jussieu.fr) Field Summary Fields Modifier and Type Field and Description protected AccessPermission currentAccessPermission The access permission granted to the current user for the document. protected boolean decryptMetadata indicates if the Metadata have to be decrypted of not protected PDDocument document The document whose security is handled by this security handler. protected byte[] encryptionKey The encryption key that will used to encrypt / decrypt. protected int keyLength The length of the secret key used to encrypt the document. protected ARCFour rc4 The RC4 implementation used for cryptographic functions. protected int version The value of V field of the Encryption dictionary. Constructor Summary Constructors Constru